Walt Doublestein to VP-video-game integration, Channel M. He'll be heading a Detroit-area office for the media outfit. He has spent the past nine years at Omnicom Group's BBDO Detroit, Troy, Mich., where his last job was director-video gaming and nontraditional marketing on Chrysler Group accounts.

Mark Westlake to exec VP-sales and content, Convex Group's HowStuffWorks.com, New York, from senior VP-sales and marketing, About.com. He was a member of the executive management team that sold About.com to The New York Times Co.

Jeff Ruhe, 54, to executive producer, Time4Media's This Old House Productions, New York, from president, American Adventure Productions, Aspen, Colo.

Joel Peresman, 49, to president-CEO, The Rock and Roll Hall of Fame Foundation, New York, from exec VP-Madison Square Garden, New York.

Robert Prazmark to exec VP, Wasserman Media Group's WMG Marketing, New York, from president-Olympic sales and marketing and senior VP-special projects and program development, IMG.